33666890 has 8 divisors (see below), whose sum is σ = 60600420. Its totient is φ = 13466752.

The previous prime is 33666859. The next prime is 33666901. The reversal of 33666890 is 9866633.

It can be written as a sum of positive squares in 2 ways, for example, as 32410249 + 1256641 = 5693^2 + 1121^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×33666890² = 2266918964544200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1683335 + ... + 1683354.

Almost surely, 2^33666890 is an apocalyptic number.

33666890 is a deficient number, since it is larger than the sum of its proper divisors (26933530).

33666890 is a wasteful number, since it uses less digits than its factorization.

33666890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3366696.

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 33666890 is about 5802.3176403916. The cubic root of 33666890 is about 322.8997186989.

The spelling of 33666890 in words is "thirty-three million, six hundred sixty-six thousand, eight hundred ninety".